JPS5813980B2 - tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus that can easily locate a desired position on a tape.

Generally, the method of finding the desired position on the tape is to perform fast forward and rewind operations while looking at the counter scale on the tape recorder. Because of the high speed, it is difficult to distinguish the scale of the first digit of the counter, and therefore, it is necessary to repeat such fast-forwarding and rewinding operations two or three times, which is inconvenient.

Also, a device has been developed in which a switch is provided on the counter, and when the scale of the counter reaches a predetermined value, the switch cancels the fast forwarding or rewinding operation, but in such a device, the counter does not indicate the predetermined scale. Since it is designed to operate only occasionally, if there are several desired parts, it is necessary to perform the above-mentioned operation, which is inconvenient.

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a device that can extremely easily find a desired portion of a tape.

An embodiment of the present invention will be described in detail below with reference to the drawings.

The drawing is a block diagram showing one embodiment of the present invention.

In the figure, 1, 2, 3, 4, 5 and 6 are operation buttons for recording, playback, rewind, fast forward, pause and stop, respectively;
7 is a control circuit that switches the operating state of the tape recorder in accordance with each operation; 8 is a plunger that performs suction operation during playback operation to put the tape recorder in the playback state; 9 is a capstan electric motor that rotationally drives the capstan; 10 1 is a reel electric motor that rotationally drives a rewinding and take-up reel shaft;
1 is a rotation direction control circuit that controls the rotation direction of the reel electric motor 10, and 12 is a rotation speed control circuit that controls the rotation speed of the reel electric motor 10.

Reference numeral 13 denotes a tape positioning operation button that is operated during a tape positioning operation, and U denotes a tape running control means that becomes operable when the positioning operation button 13 is operated.

15 is an adjustment knob constituting the tape running control means 14;
Reference numeral 16 denotes a variable resistor that can be varied by the adjustment knob 15, and both positive and negative voltages are applied to both ends of the variable resistor, and the midpoint thereof is grounded.

Reference numeral 17 denotes a voltage detection circuit that detects the voltage guided by the slider of the variable resistor 16 and controls the rotation speed and rotation direction of the reel motor 10.

Reference numeral 18 denotes an induced voltage detection circuit that detects an induced signal from the human body when the user touches the adjustment knob 15, and causes the tape running control means 14 to operate only during an adjustment operation.

Reference numeral 19 denotes a selection circuit that prevents the signal from the tape running control means 14 from being applied to the control circuit I and the voltage detection circuit 17 in the recording state.

The circuits described above are related as shown.

The present invention is constructed as described above, and its operation will be explained next.

First, a normal operation in which the tape positioning operation button 13 is not operated will be explained.

In this state, the voltage detection circuit 17 that controls the rotation speed and rotation direction of the reel electric motor 10 is in an inoperative state, so the rotation direction control circuit 11 and the rotation speed control circuit 12 are in a state controlled by the control circuit 7.

From this state, the user can press the recording operation button 1 and the playback operation button 2.
When the rewind operation button 3 and the fast forward operation button 4 are operated appropriately, the control circuit 7 performs operations corresponding to each operation, and puts the reel electric motor 10, the capsun electric motor 9, and the plunger 8 in a state suitable for each operation. Each operation of a switching tape recorder is configured.

Furthermore, if the stop operation button 6 is operated in each operating state, each operation is canceled and the tape recorder returns to the stopped state, and if the pause operation button 5 is operated in the recording or playback state, the take-up reel will start. At the same time, the winding force of the capsun and the pinch roller is released, and the tape recorder becomes temporarily stopped.

Next, the operation when the tape positioning operation button 13 is operated while the tape recorder is in each state will be explained.

1. Reproducing state When the tape recorder is in the reproducing state, when the tape positioning operation button 13 is operated, the tape running control means 14 becomes operational, but does not operate until the user touches the adjustment knob 15.

When the user touches the adjustment knob 15, the tape running control means 1
4 is activated, the signal is applied to the control circuit 7 through the positioning operation button 13 and the selection circuit 19, and the reproduction state of the tape recorder is canceled.

When the slider of the variable resistor 16 is at the midpoint, its potential is zero, so the tape is not run and is in a stopped state.

In this state, when the adjustment knob 15 is adjusted to move the slider to the positive potential side, the voltage detection circuit 17 detects the positive potential and controls the rotational direction control circuit 11 and the rotational speed control circuit 12 to remove the tape. Fast forward.

Also, when the slider is moved to the negative potential side, the voltage detection circuit 1
7 detects the negative potential and controls the rotational direction control circuit 11 and rotational speed control circuit 12 to rewind the tape.

The running speed of the tape in this state increases as the positive and negative potentials increase toward the positive and negative sides, respectively.

Also, no matter which position the slider is in, the user can adjust the adjustment knob 1.
When you release the button 5, the tape recorder returns to playback mode.

2. Recording state When the tape positioning operation is performed in the recording state, the selection circuit 19 prevents the application of the control signal from the tape running control means 14 to the control circuit T and the voltage detection circuit 13, and the tape recorder stops recording operation. Continue.

3. Fast-forwarding and rewinding states When the adjustment knob 15 is operated in these fast-forwarding and rewinding states, a control signal from the tape running control means 14 is applied to the control circuit 7 and voltage detection circuit 17, resulting in the operation described in the playback state section. will be carried out.

In this state, when the user releases the adjustment knob 15, the tape recorder returns to the stopped state.

4. Stopped state When the adjustment knob 15 is operated in the stopped state, the tape is fast-forwarded or rewound depending on the position of the slider of the variable resistor 16, and when the adjustment knob 15 is released, the tape recorder returns to the stopped state.

5. Pause State First, in the pause state in the playback state, the tape is fast-forwarded or rewound as the adjustment knob 15 is operated as described above, and when the adjustment knob 15 is released, the tape returns to the pause state.

Furthermore, when a pause operation is performed in the recording state, the blocking of the control signal of the selection circuit 19 from being applied to the control circuit 7 and the voltage detection circuit 17 due to the recording operation is canceled.
As a result, the tape is fast-forwarded or rewound as the adjustment knob 15 is operated.

When the user releases the adjustment knob 15, the tape recorder returns to the paused state.

As explained above, the present invention allows the tape to be moved from a fast forward state to a rewind state by a tape positioning operation.
Furthermore, since the rewinding state is continuously changed to the fast forwarding state, the desired position of the tape can be easily found, which is very effective when editing the tape.

In addition, since the switching operation of the tape running state is controlled by the guidance signal obtained from the adjustment knob, you can press the positioning operation button without checking whether the adjustment knob is in the fast forward or rewind position. The present invention has excellent operability, since it is possible to prevent malfunctions such as the tape running state being immediately changed and running in a direction contrary to the user's intention even if the tape is operated.

[Brief explanation of the drawing]

The drawing is a block circuit diagram showing one embodiment of the device of the present invention. Explanation of main drawing numbers, 7... Control circuit, 9...
...Electric motor for capstan, 10...Electric motor for reel, 11...Rotation direction control circuit, 12...
... Speed control circuit, 13 ... Tape positioning operation button, 14 ... Tape travel control means, 1
5...adjustment knob, 17...voltage detection circuit, 18...induced voltage detection circuit, 19...
...Selection circuit.

Claims (1)

[Claims] 1. In a tape recorder equipped with operation buttons for recording, playback, fast forward, rewind, and stop, an operation button for positioning the tape is provided separately from each of the operation buttons and is operated during the positioning operation; A tape running control means including a manually operated adjustment knob which becomes operational by operating the tape positioning operation button, and a signal obtained from the tape running control means changes the running of the tape from a fast forward state to winding. Tape running switching means for continuously changing from the rewinding state to the fast forwarding state, and detecting a guiding signal obtained from the adjustment knob, and applying a signal from the tape running control means to the tape running switching means. A tape recorder comprising an induced voltage detection circuit for controlling the operation, and allowing the tape running control means to control the tape running switching means only while touching the adjustment knob in the positioning state. .